from dataclasses import dataclass, field

from pydantic import BaseModel

from fansifter_common.adapters.sendgrid.constants import MERGE_TAG_DEFAULTS


class Error(BaseModel):
    message: str
    field: str | None = None
    help: str | None = None


class ErrorResponse(BaseModel):
    errors: list[Error]
    id: int | None = None


@dataclass(kw_only=True, slots=True)
class Email:
    email: str
    name: str | None = None

    def get(self) -> dict[str, str]:
        ret = {"email": self.email}
        if self.name:
            ret["name"] = self.name
        return ret


@dataclass(kw_only=True, slots=True)
class MergeTags:
    first_name: str | None = None

    def to_substitutions(self) -> dict[str, str]:
        return {
            "-firstName-": self.first_name or MERGE_TAG_DEFAULTS["first_name"],
        }


@dataclass(kw_only=True, slots=True)
class FanData:
    email: str
    profile_token: str | None = None
    country_iso2: str
    privacy_links_block: str
    legal_entity_name: str
    legal_entity_address: str
    opt_in_info: str
    unsubscribe_text: str
    opt_in_info_external: str
    double_opt_in_url: str | None = None
    profile_text: str | None = None
    merge_tags: MergeTags = field(default_factory=MergeTags)

    def __post_init__(self) -> None:
        self.country_iso2 = self.country_iso2.lower()


def apply_fallback_merge_tags(html: str) -> str:
    for token, value in MergeTags().to_substitutions().items():
        html = html.replace(token, value)
    return html